
Ubuntu 14.04 and 16.04

If you are using Ubuntu 14.04 or 16.04, you can use J Fernyhough's PPA at https://launchpad.net/~jonathonf/+archive/ubuntu/python-3.6:

sudo add-apt-repository ppa:jonathonf/python-3.6
sudo apt-get update
sudo apt-get install python3.6
Alternatively, you can use Felix Krull's deadsnakes PPA at https://launchpad.net/~deadsnakes/+archive/ubuntu/ppa:

sudo add-apt-repository ppa:deadsnakes/ppa
sudo apt-get update
sudo apt-get install python3.6
Ubuntu 16.10, 17.04 and 17.10

If you are using Ubuntu 16.10, 17.04 or 17.10, then Python 3.6 is in the universe repository, so you can just run:

sudo apt-get update
sudo apt-get install python3.6
After installation

To invoke the Python 3.6 interpreter, run python3.6.